Thanks for taking the time to play through the whole demo! Due to trying to fit such a large game world into 64 KB, I had to do a lot of recycling level design elements, but I tried to keep each area unique by changing up the palette, enemies, etc.
That recycling actually felt like it contributed positively to the experience! Like, never once was I thinking it was cheap or lazy. Every time I saw a reused room I thought “oh right, I’ve seen this before and couldn’t get through this part at the time, I should go back to that”